Hearing loss, vestibular (balance) disorders, and facial / ENT impairment. These arrive directly as a whole-person impairment (WPI) percentage.
How hearing-loss ratings work: the evaluator computes impairment from audiometric testing — pure-tone thresholds in each ear are combined into a binaural hearing impairment, which converts to whole-person impairment under Chapter 11 of the AMA Guides. The 2005 schedule files hearing impairment under number 11.01.01.00 (vestibular/balance disorders under 11.01.02.00), and the WPI then runs the standard pipeline: the 1.4 adjustment, occupational variant — noise-exposed trades often carry higher variants for hearing — and the age modifier.